Cooling mode of dry-type power transformer

Abstract

The invention relates to the technical field of cooling, and discloses a cooling mode of a dry-type power transformer, which comprises an air inlet fan used for extracting fresh air from the outside and providing required airflow for the whole cooling system; the cooler is used for reducing the temperature of air passing through the cooler, the dry-type transformer is used for carrying out electric power conversion among different voltage grades, the direction of a cooling air path of the dry-type transformer is forced through the installation structure of the air inlet fan, the air feeder and the air channel, and resource waste is avoided. A traditional dry-type transformer cooling mode is broken through, inlet air is cooled through cooling water, the inlet air temperature is reduced, and therefore heat generated in the operation process of the transformer is better taken away. The temperature measuring points are used for detecting the temperature of the iron core and the winding of the transformer in real time, when the temperature reaches a limit value, the air inlet fan and the air outlet fan are started to cool the transformer, electric energy consumption caused by continuous operation of the air inlet fan and the air outlet fan is avoided, and the effects of saving energy and reducing consumption are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of cooling, and in particular to a cooling method for a dry-type power transformer. Background Art

[0002] At present, there are two main cooling methods used for dry-type power transformers produced on the market, one is natural air cooling and the other is forced air cooling, but the cooling effect is not good. Alarms often occur due to high temperature of the transformer winding, which not only reduces the stability of the transformer operation, but also aggravates the aging of the transformer insulation to a certain extent, affecting the service life of the transformer. At the same time, as users have higher and higher requirements for products, there are certain restrictions on the temperature rise of the transformer. Traditional cooling methods cannot meet the requirements, so it is necessary to design a cooling system with excellent cooling effect. Summary of the invention

[0003] In view of the problems existing in the cooling method of the above-mentioned existing dry-type power transformer, the present invention is proposed.

[0004] Therefore, the object of the present invention is to provide a cooling method for a dry-type power transformer, and its purpose is to design a cooling system with excellent cooling effect.

[0005] To solve the above technical problems, the present invention provides the following technical solutions: A cooling method for a dry-type power transformer includes an air inlet fan for drawing fresh air from the outside to provide the required airflow for the entire cooling system; and a cooler for reducing the temperature of the air passing through it.

[0006] As a preferred solution for the cooling method of the dry-type power transformer described in the present invention, a ventilation duct is installed at one end of the cooler, and the ventilation duct is used to connect the cooler and the channel between the dry-type transformer windings to ensure that the cold air can accurately flow to the position that needs cooling; the dry-type transformer is used for power conversion between different voltage levels.

[0007] As a preferred solution of the cooling method of the dry-type power transformer of the present invention, the air inlet fan is arranged on the left side of the transformer casing, and the air outlet fan is installed on the right side of the dry-type transformer casing.

[0008] As a preferred solution of the cooling method of the dry-type power transformer of the present invention, the air outlet fan is used to extract hot air that has absorbed heat to maintain air circulation in the transformer.

[0009] As a preferred solution of the cooling method of the dry-type power transformer of the present invention, the cooler divides the dry-type transformer housing into two parts, and circulating cooling water is introduced into the cooler.

[0010] As a preferred solution for the cooling method of the dry-type power transformer described in the present invention, a cooling water inlet and a water outlet are provided inside the cooler for circulating cooling water. The cooling water enters from the water inlet and flows out from the water outlet after heat exchange with the air in the cooler.

[0011] As a preferred solution of the cooling method of the dry-type power transformer of the present invention, the dry-type transformer includes a temperature measuring point, which is installed on each phase of the dry-type transformer and is used to detect the temperature of the transformer core and winding in real time.

[0012] As a preferred solution for the cooling method of the dry-type power transformer described in the present invention, the temperature measuring point uploads the temperature data to the transformer temperature controller display device, and automatically controls the operation of the air inlet and outlet fans by setting the transformer temperature limit value.

[0013] As a preferred solution for the cooling method of the dry-type power transformer described in the present invention, the transformer temperature controller display device is used to collect data from various temperature measurement points, and control the working status of the air inlet and outlet fans according to the set temperature threshold to achieve intelligent regulation.

[0014] In order to solve the above technical problems, the present invention also provides the following technical solutions: a method for using the cooling method of a dry-type power transformer, comprising the cooling method of the dry-type power transformer, and,

[0015] A. Natural air is inhaled through the air inlet fan; B. The circulating cooling water in the cooler is used to reduce the air inlet temperature; C. Cold air enters the gap between the transformer windings through the ventilation duct for cooling; D. Hot air is discharged by the air outlet fan; E. The transformer temperature is monitored using temperature measuring points, and the operation of the air inlet fan and the air outlet fan is automatically controlled according to the temperature limit value.

[0016] The beneficial effects of the present invention are as follows: through the installation structure of the air inlet fan, the air supply fan and the air duct, the cooling air path of the dry-type transformer is forced to move in a certain direction, thus avoiding waste of resources. The traditional cooling method of the dry-type transformer is broken through, and the air inlet is cooled by cooling water to reduce the air inlet temperature, thereby better taking away the heat generated during the operation of the transformer. The temperature measuring point is used to detect the temperature of the transformer core and winding in real time. When the temperature reaches the limit value, the air inlet fan and the air outlet fan are started to cool the transformer, thus avoiding the power consumption caused by the continuous operation of the air inlet fan and the air outlet fan, thus playing a role in energy saving and consumption reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 It is a schematic diagram of the overall structure of the air inlet fan at different positions of the present invention.

[0020] In the figure:

[0021] 100. Dry-type transformer; 200. Air inlet fan; 300. Air outlet fan; 400. Cooler; 500. Air inlet duct. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0023] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0024] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0025] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0026] Example 1

[0027] Reference Figure 1 , which is the first embodiment of the present invention, provides a cooling method for a dry-type power transformer. The device includes an air inlet fan 200, which is used to draw fresh air from the outside to provide the required airflow for the entire cooling system; and a cooler 400, which is used to reduce the temperature of the air passing through it.

[0028] Specifically, a ventilation duct is installed at one end of the cooler 400, and the ventilation duct is used to connect the cooler 400 and the channel between the windings of the dry-type transformer 100 to ensure that the cold air can accurately flow to the position that needs cooling; the dry-type transformer 100 is used for power conversion between different voltage levels.

[0029] Furthermore, the air inlet fan 200 is arranged on the left side of the transformer casing, and the air outlet fan 300 is installed on the right side of the dry-type transformer 100 casing. The air outlet fan 300 is used to extract hot air that has absorbed heat to maintain air circulation in the transformer.

[0030] The cooler 400 divides the housing of the dry-type transformer 100 into two parts, and circulating cooling water is introduced into the cooler 400 .

[0031] Preferably, a cooling water inlet and outlet are provided inside the cooler 400 for circulating cooling water. The cooling water enters from the inlet, exchanges heat with the air inside the cooler 400, and then flows out from the outlet.

[0032] It should be noted that the dry-type transformer includes a temperature measuring point, which is installed on each phase of the dry-type transformer 100 and is used to detect the temperature of the transformer core and winding in real time. The temperature measuring point uploads the temperature data to the transformer temperature controller display device, and automatically controls the operation of the air inlet fan 200 and the air outlet fan 300 by setting the transformer temperature limit value. The transformer temperature controller display device is used to collect data from each temperature measuring point, and control the working state of the air inlet fan 200 and the air outlet fan 300 according to the set temperature threshold value to achieve intelligent regulation.

[0033] When in use, natural air is sucked in through the air inlet fan 200, and the circulating cooling water in the cooler 400 is used to reduce the inlet air temperature. The cold air enters the gap between the transformer windings through the ventilation duct for cooling, and the hot air is discharged by the air outlet fan 300. The temperature measuring point is used to monitor the transformer temperature, and the operation of the air inlet fan 200 and the air outlet fan 300 is automatically controlled according to the temperature limit value.

[0034] In summary, the installation structure of the air inlet fan 200, the air supply fan and the air duct forces the cooling air path of the dry-type transformer 100 to avoid waste of resources. The traditional cooling method of the dry-type transformer 100 is broken through, and cooling water is used to cool the air inlet to reduce the air inlet temperature, thereby better taking away the heat generated during the operation of the transformer.

[0035] The temperature measuring points are used to detect the temperature of the transformer core and winding in real time. When the temperature reaches the limit value, the transformer is cooled by starting the air inlet fan 200 and the air outlet fan 300, thereby avoiding the power consumption caused by the continuous operation of the air inlet fan 200 and the air outlet fan 300, playing a role in energy saving and consumption reduction, greatly improving the cooling effect of the dry-type transformer 100, and avoiding the reduction of equipment reliability and shortening of service life caused by transformer insulation aging; while achieving the cooling effect, it also takes into account avoiding long-term operation of the equipment, automatically realizing start and stop, and effectively avoiding power consumption.

[0036] Example 2

[0037] Reference Figure 1 , which is the second embodiment of the present invention.

[0038] The operation process of the device improves the cooling effect of the dry-type transformer 100 by cooling with cooling water, and increases the output capacity of the dry-type transformer 100, thereby ensuring the safe operation of the dry-type transformer 100 and extending the service life of the transformer. The use of water as a cooling medium is based on the fact that water is non-toxic, non-combustible, cheap, and has a heat conduction efficiency that is times higher than that of air. The air inlet 200 is arranged on the left side of the dry-type transformer 100 shell, and the air outlet 300 is installed on the right side of the dry-type transformer 100 shell. The cooler 400 completely divides the dry-type transformer 100 shell into two parts. By passing circulating cooling water into the cooler 400, the cooler 400 includes a cooling water inlet and a cooling water outlet. The air inlet 200 inhales natural air from the atmosphere. After the natural air passes through the cooler 400, the temperature is reduced. The cold air enters the gap between the high and low voltage windings of each phase of the dry-type transformer 100 through the ventilation duct to cool the winding and the iron core, and absorbs the heat generated when the transformer is running. The hot air is discharged into the atmosphere along with the suction of the air outlet 300. A temperature measuring point is installed on each phase of the dry-type transformer 100 and uploaded to the transformer temperature controller display device. By setting the transformer temperature limit value, the operation of the air inlet fan 200 and the air outlet fan 300 can be automatically controlled, thereby avoiding continuous operation of the air inlet fan 200 and the air outlet fan 300 and achieving energy saving and consumption reduction effects.

[0039] Example 3

[0040] Reference Figures 1-2 , which is the third embodiment of the present invention. This embodiment is different from the second embodiment in that the positions of the air inlet fan 200 and the air outlet fan 300 are adjustable, and the air inlet fan 200 and the air outlet fan 300 at different positions have different effects.

[0041] Furthermore, the arrangement of the air inlet fan 200 and the air outlet fan 300 helps to form an orderly airflow path. The air inlet fan 200 inhales fresh air from the left side, and after being processed by the cooler 400, the cold air enters the transformer through the ventilation duct, while the hot air is extracted by the air outlet fan 300 on the right side. This layout helps to form a unidirectional airflow, avoid airflow chaos, and improve cooling efficiency.

[0042] Furthermore, the position of the air inlet fan 200 can also be set at a higher position of the cooler 400. At this time, after the air is cooled by the cooler 400, the air becomes cold and falls. Therefore, setting the air inlet fan 200 at a higher position can allow the air to be fully cooled by the cooler 400, making the cooler 400 more efficient, and at the same time it will not mix with the cooled air, making the mixing process more efficient.

[0043] When in use, the air outlet fan 300 is best positioned at a higher position of the housing of the dry-type transformer 100. After the dry-type transformer 100 is cooled by cold air, the air becomes hot and rises. The air is sucked out of the housing of the dry-type transformer 100 through the air outlet fan 300 at a higher position, making the heat dissipation process more efficient.

[0044] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0045] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0046] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A cooling method for a dry-type power transformer, characterized in that: include, The air inlet fan (200) is used to draw fresh air from the outside to provide the required airflow for the entire cooling system; The cooler (400) is used to reduce the temperature of the air passing through it.

2. The cooling method of the dry-type power transformer according to claim 1 is characterized in that: A ventilation duct (500) is installed at one end of the cooler (400). The ventilation duct (500) is used to connect the cooler (400) and the passage between the windings of the dry-type transformer (100), so as to ensure that the cold air can accurately flow to the position that needs to be cooled; The dry-type transformer (100) is used for power conversion between different voltage levels.

3. The cooling method of the dry-type power transformer according to claim 2 is characterized in that: The air inlet fan (200) is arranged on the left side of the transformer housing, and the air outlet fan (300) is installed on the right side of the housing of the dry-type transformer (100).

4. The cooling method of the dry-type power transformer according to claim 3 is characterized in that: The air outlet fan (300) is used to extract hot air that has absorbed heat and maintain air circulation in the transformer.

5. The cooling method of the dry-type power transformer according to claim 4 is characterized in that: The cooler (400) divides the housing of the dry-type transformer (100) into two parts, and circulating cooling water is introduced through the interior of the cooler (400).

6. The cooling method of the dry-type power transformer according to claim 5 is characterized in that: The cooler (400) is provided with a cooling water inlet and a water outlet inside for circulating cooling water. The cooling water enters from the water inlet, exchanges heat with air in the cooler (400), and then flows out from the water outlet.

7. The cooling method of the dry-type power transformer according to claim 6 is characterized in that: The dry-type transformer (100) comprises: A temperature measuring point is installed on each phase of the dry-type transformer (100) and is used to detect the temperature of the transformer core and winding in real time.

8. The cooling method of the dry-type power transformer according to claim 7 is characterized in that: The temperature measuring point uploads the temperature data to the transformer temperature controller display device, and automatically controls the operation of the air inlet fan and the air outlet fan by setting the transformer temperature limit value.

9. The cooling method of the dry-type power transformer according to claim 8 is characterized in that: The transformer temperature controller display device is used to collect data from various temperature measurement points and control the working states of the air inlet fan and the air outlet fan according to the set temperature threshold to achieve intelligent regulation.

10. A method for using a cooling method for a dry-type power transformer, characterized in that: A cooling method for a dry-type power transformer comprising any one of claims 1 to 9, and A. Inhale natural air through the air intake fan; B. Use the circulating cooling water in the cooler to lower the inlet air temperature; C. Cold air enters the gap between transformer windings through the ventilation duct for cooling; D. Hot air is discharged by the blower; E. Use temperature measuring points to monitor transformer temperature and automatically control the operation of the air inlet and outlet fans according to the temperature limit value.

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